1.If you can make sure that you have use the correct gsunlight mb star c4 software with the mb star multiplexer, and you do not change anything for our MB Star software, and also self-test can be ok; then you can try to replace the config file on the c:programmmecredes-benzconfig to solvoe it;

2.If still can not solve, please check if you connect the car well, and if your car is good to test without any problem, and try to test other cars to see if you have the same error.

3.If the first 2 ways both can not solve your problem, please send back the main unit and software to us for checking and repair.

scn coding meaning:
Software Calibration Number coding, short for SCN coding is intrudes by Mercedes Benz around 2005. It replaced the previous coding technique with a centralized and almost automated technique to prevent incorrect coding being selected when replacing a module.

scn coding service:
Can be done online or offline

mercedes scn coding software:
You should have working XENTRY/DAS (crack ok).
For old Mercedes (-2009), you should have software version 12.2016 or earlier:
For new Mercedes (2009-2017), you should have software version 03.2017 or newer:

scn coding calculator:
Forget it if you find it on some forums. Usually it is a fake program, it will never calculate the SCN string.

mercedes coding forum:

https://mbworld.org/forums/

http://www.mbclub.co.uk/forums/

http://www.mercedescla.org/forum/

http://www.mbstartool.com/

Which version for Mercedes OFFLINE SCN coding? And which for ONLINE coding?
For OFFLINE coding, you should have old versions before 12.2016.
For ONLINE coding, use new XENTRY/DAS after 03.2017

What should i have for SCN coding to my Mercedes?
Star diagnostic tool (sdconnect c4 better, a HQ clone also ok)
XENTRY/DAS (original, or crack version have been tested!!)
Working laptop
Account of Scn coding service

What models (and the year) for SCN coding?
You can have NEW Mercedes for ONLINE coding, while pre-2009 models for OFFLINE coding.
Online & offline coding can be done with different server data. Online scn coding uses data from the Mercedes dealer; it’s original.

I have a 2017 model. Can i have it do offline coding?
No. 2017 new models can be worked though offline coding, with post-2017.3 Xentry/DAS.

When should i have SCN coding?
1. Check engine light on
2. Transmission gets stuck in 1 gear. If your have trouble with transmission, there is a good chance that the problem is with you ME control unit and that SCN coding is needed to resolve the issue.
3. Turn the engine and it on again

Can you give me a coding account? Or where to buy?
For OFFLINE scn coding, it’s xentry offline scn coding activation service

How to do online scn coding service with Xentry/DAS 2017?
(works for new Mercedes the 2017 year)

Here is the online SCN coding guide.
1. Configure MB STAR:
Come to “SDnet Control” menu>> Configuration >>Network: workshop cable network>> Place a checkmark next to “Automatically obtain IP address”
2. To check the active Internet connection, select Star Browser. The registration window for the after-sales platform should open. Enter the Service Name and password if request.
3. Connect mercedes benz star Scanner system with vehicle
4. Start STAR DAS software program
5. Select Benz model and make: Vans>>V-Class >>Sprinter>>Model designation>>Vehicle recognition. If the vehicle is not recognized, enter the required data manually (e.g. Germany, Rest of World)
6. Entry for retrofits and modifications – Select “Online” (“networked Star Diagnosis device”)
7. Change or enter the vehicle equipment codes: + ED5 (PSM installed), – ED8 (PSM preinstallation).
NOTE: If the vehicle does not have a preinstallation (ED8), ED8 does not need to be changed to ED5.
8. Run a Quick test
9. Come to the EIS (electronic ignition starter switch) control unit>> Control unit adaptation >>SCN coding >>Select the “Online (networked Star Diagnosis unit)” menu option
10. SCN coding will start automatically (visible on the progress bar on the screen). Please strictly follow the STAR diagnostic software instructions. Otherwise the control unit may be destroyed during the coding procedure.
11. When the system display a comment “The coding variant has been changed”, the SCN coding is completed. The parameterization has been completely taken over in the EIS and is thus finished.

How to get mercedes scn coding offline with Xentry/DAS 2015 (or earlier)?

(used for Mercedes-Benz vehicles pre-2009)

Preparation: activation ID
1. After you install the software, you will see below program, send us the correct ID on the upper left corner (marked red circle). Do not send the ID in windows box.
2. Open upper left corner icon, you will see the correct ID:
3. Copy the ID and send it to us. We will resend you a license.
4. Extract the license and run it directly. Then the software will be ready for use.

A) Determine vehicle data for offline SCN coding from the vehicle.
1. Select control unit in DAS.
2. Select menu item “control unit adaptations” or “initial startup”.
Continue with “F3″.
3. Select menu item “SCN coding”. Continue with “F3″.
4. Select “Offline (STAR DIAGNOSIS device not-networked)” menu item. Continue with “F3″.
5. Confirm note on sequence of SCN coding with “F2″.
6. Completely fill out fax form and click “F11″ to print out.
NOTE:If an email address is entered in the fax form, you will be sent the Mercedes Benz Diagnostic Scanner data per email. If a fax number is entered in the fax form, you will be sent the SCN coding data per fax.
7. Send printed out fax form to the given fax no. for the Star Diagnosis Help Desk.

B) Perform SCN coding. The coding is performed with the SCN coding data from the Star Diagnosis Help Desk.
NOTE: If the SCN coding data are received per email, burn the data to a CD or save the data on a USB removable storage device and identify accordingly. Unpack the Zip files first when doing so.
8. In the DAS, choose the “Step 2: Perform SCN coding” menu item. Continue with “F3″.
9.1 Select keyboard input using “F4″.
For SCN coding data per fax.
9.2 Insert CD or connect USB removable storage device.
For SCN coding data per email.
10.1 Enter SCN coding data manually into the DAS.
For SCN coding data per fax.
10.2 Confirm using “F3″ and import the data per CD or USB removable storage device.
For SCN coding data per email.
11 Perform SCN coding.
12. Switch ignition on/off.
Control unit specific, refer to specification in DAS.
13. Press “F11″ to print out the order log and enclose the repair order.
NOTE: The order log can also be stored on the DAS. This is done by clicking on “F11″, “Print to file”, selecting “printout of test step” and entering a file name. In StarUtilities, the StarPad program can be used to display and printout the order log at the “Logs” menu item.
14. Continue with “F2″.
NOTE: The Auto diagnostic tool SCN coding of the control unit is completed. Scrap the CD following successful SCN coding as per the guidelines for theft-relevant parts (DTR 69/00). The scrapping process is to be documented on the repair order. The data on the USB removable storage device are to be deleted properly once they have been used.

MB STAR Diagnostic Tools software can code out ABC, here is the example on code out Mercedes SL65.
NOTE : the instruction here only for R230s (not any W215, W216, W220, W221)

To do this, you need a MB Star diagnostic SD Connect C4 with Developer mode. Hook up SD Connect diagnostic system to your car and when it reads your car, select Control Units, pick Information and Communication and you will see ICM :

After ICM, you will see Control Unit Adaptions :

From there, choose the year of your model :

From there, select Special Equipment

Select ABC :

Then go to the drop down tab and change it from PRESENT to NOT PRESENT, and click F3.
After that, turn off the car, with the doors closed.
Wait 1-2 mins and start the car back up (no more ABC codes and no white or red lights).

After days of investigation and testing, the most important thing to understand is this. The drivers for your wireless card MUST support AdHoc functionality. The Benz diagnostic tools are the secret sauce that makes this possible. This can be verified at the DOS command prompt. The command is: netsh wlan show drivers
This command will show “Yes” or “No” on the line for “Hosted Network Support”.
If this line says “No”, AdHoc will not work properly.

Although I’m running Win10, Intel has drivers for the 8260 wireless card for Win8 which will enable proper AdHoc functionally.

The trick is to download the driver first, prior to removing your existing wireless driver. Download the driver ONLY, not any driver file with additional driver management apps included in the downloaded file.

Now you can go into Device Manager and remove your existing wireless card AND check the box that removes all software associated with it. My Win8 driver download file was a .exe file. I double clicked on it and the Win8 driver for my Intel 8260 card was installed. Went to Device Manager, right clicked on my 8260 wireless card and selected Properties. Clicked on Advanced and was able to see several AdHoc related entries. These AdHoc entries were not visible using the Win10 drivers.

AdHoc can now be verified at the DOS command prompt. The command is:
netsh wlan show drivers
This command will show “Yes” on the line for “Hosted Network Support”.
If this line says “No”, AdHoc will not work properly

With AdHoc functionality confirmed, additional DOS commands can now be used to enable Road24h wireless connectivity. The procedures for the additional steps required are well documented in OBD2TOOL or GOOGLE.

This is what worked for me. Depending on your computer skills, your results may vary.

If you find my posting to be of help to you, Thanks and Rep would be most appreciated.